During his speech in Indiana, Trump said: "Our framework includes our explicit commitment that tax reform will protect low-income and middle-income households, not the wealthy and well-connected. They can call me all they want. It's not going to help. I'm doing the right thing, and it's not good for me. Believe me."

But Trump's tax plan actually has some major benefits for wealthy Americans.

Right now, the 39.6 percent tax rate is for individuals who make above about $420,000. Trump wants to slash that down to 35 percent, and he could potentially raise the threshold where that rate kicks in.

Trump's outline also gets rid of the controversial estate tax, which puts a 40 percent tax on wealth passed on to family members after someone dies. But that tax only covers estates over $5.49 million — which affects less than 1 percent of the population.